added validateData method to program.cs of sample project

bezzad · Dec 23, 2023 · 2084c85 · 2084c85
1 parent 18f67ed
commit 2084c85
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Showing 2 changed files with 30 additions and 3 deletions.
diff --git a/src/Samples/Downloader.Sample/DownloadList.json b/src/Samples/Downloader.Sample/DownloadList.json
@@ -6,14 +6,17 @@
   },
   {
     "FolderPath": "D:\\TestDownload",
-    "Url": "http://localhost:3333/dummyfile/file/LocalFile100MB_WithContentDisposition.dat/size/104857600"
+    "Url": "http://localhost:3333/dummyfile/file/LocalFile100MB_WithContentDisposition.dat/size/104857600",
+    "ValidateData": true
   },
   {
     "FolderPath": "D:\\TestDownload",
-    "Url": "http://localhost:3333/dummyfile/noheader/file/LocalFile100MB_WithoutHeader.dat?size=104857600"
+    "Url": "http://localhost:3333/dummyfile/noheader/file/LocalFile100MB_WithoutHeader.dat?size=104857600",
+    "ValidateData": true
   },
   {
     "FolderPath": "D:\\TestDownload",
-    "Url": "http://localhost:3333/dummyfile/file/LocalFile100MB.dat?size=104857600"
+    "Url": "http://localhost:3333/dummyfile/file/LocalFile100MB.dat?size=104857600",
+    "ValidateData": true
   }
 ]
diff --git a/src/Samples/Downloader.Sample/Program.cs b/src/Samples/Downloader.Sample/Program.cs
@@ -148,9 +148,33 @@ private static async Task<IDownloadService> DownloadFile(DownloadItem downloadIt
             await CurrentDownloadService.DownloadFileTaskAsync(downloadItem.Url, downloadItem.FileName).ConfigureAwait(false);
         }
 
+        if (downloadItem.ValidateData)
+        {
+            var isValid = await ValidateDataAsync(CurrentDownloadService.Package.FileName, CurrentDownloadService.Package.TotalFileSize).ConfigureAwait(false);
+            if (!isValid)
+            {
+                throw new InvalidDataException("Downloaded data is invalid: " + CurrentDownloadService.Package.FileName);
+            }
+        }
+
         return CurrentDownloadService;
     }
 
+    private static async Task<bool> ValidateDataAsync(string filename, long size)
+    {
+        await using var stream = File.OpenRead(filename);
+        for (var i = 0L; i < size; i++)
+        {
+            var next = stream.ReadByte();
+            if (next != i % 256)
+            {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
     private static void WriteKeyboardGuidLines()
     {
         Console.Clear();